312302213 has 4 divisors (see below), whose sum is σ = 312807360. Its totient is φ = 311797068.

The previous prime is 312302203. The next prime is 312302219. The reversal of 312302213 is 312203213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312203213 = 7 ⋅44600459.

It is a cyclic number.

It is not a de Polignac number, because 312302213 - 2⁶ = 312302149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312302191 and 312302200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312302219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251645 + ... + 252882.

It is an arithmetic number, because the mean of its divisors is an integer number (78201840).

Almost surely, 2^312302213 is an apocalyptic number.

It is an amenable number.

312302213 is a deficient number, since it is larger than the sum of its proper divisors (505147).

312302213 is an equidigital number, since it uses as much as digits as its factorization.

312302213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505146.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 312302213 is about 17672.0743830485. The cubic root of 312302213 is about 678.4612068625.

Adding to 312302213 its reverse (312203213), we get a palindrome (624505426).

The spelling of 312302213 in words is "three hundred twelve million, three hundred two thousand, two hundred thirteen".